Your Profile says MAC v8.That's pretty much 'unsupported' these days.However, your screenshot is from a PC !Probably a newer SketchUp version...What's its SketchUp version ?

One thought, when you installed SketchUp on that PC did you do it properly ?It must be done this way...Close SketchUp.Find the SketchUp installer exe file - probably in your Downloads folder ?Select its icon.Right-click > Context-menu > "Run as administrator..."In your case, because it's already Installed, when prompted choose the "Repair" option.[With a totally fresh install the prompt is "Install..."]

Restart SketchUp to see if that has helped - it can do no harm.

Installing complex applications in any other way - e.g. by double-clicking the installer's exe file's icon - will result in a faulty installation.Permissions to write to some folders etc will be unpredictably affected, and SketchUp might then be unable to write files into Temp folders to extract into your Users...Plugins folder etc.

Another thought, what is your Windows user name ?Names containing accented characters used to always break SketchUp's Ruby file/folder processes.Newer SketchUp versions are more robust, but occasionally users with accented characters in their Windows user-name, when using certain unusual alphabets - e.g. Greek or Cyrillic - report issues...To test this find your Users...Plugins folder [there's a tool in the SketchUcation submenu to open it for you].Copy the full path as a text string.Open the Ruby Console in SketchUp.Paste the text string into the following code snippet.File.exist?("TEXT_STRING_GOES_HERE")Note that you must use the ""If it returns false there's an issue...

@tig Tig thank you,sorry I forgot about profile, I will correct it.yes it is PC version skp2018 pro licence.Strange things happend because app was working perfectly. I had a brake of some time in using skp and this started. I wonder if some win10 updates could change some acces rigths or other thing like > I have problem with other app, UnrealEngine Studio plugin for Sketchup installer is not working.I will try to make reinstall and will see.

TIG wrote:Your Profile says MAC v8.That's pretty much 'unsupported' these days.However, your screenshot is from a PC !Probably a newer SketchUp version...What's its SketchUp version ?

One thought, when you installed SketchUp on that PC did you do it properly ?It must be done this way...Close SketchUp.Find the SketchUp installer exe file - probably in your Downloads folder ?Select its icon.Right-click > Context-menu > "Run as administrator..."In your case, because it's already Installed, when prompted choose the "Repair" option.[With a totally fresh install the prompt is "Install..."]

Restart SketchUp to see if that has helped - it can do no harm.

I did Repair.

TIG wrote:Installing complex applications in any other way - e.g. by double-clicking the installer's exe file's icon - will result in a faulty installation.Permissions to write to some folders etc will be unpredictably affected, and SketchUp might then be unable to write files into Temp folders to extract into your Users...Plugins folder etc.

During Repair process I had windows error 2203 so I added Allow permission to All for Users..local/temp folder. then Repair went with no problem.

TIG wrote: Another thought, what is your Windows user name ?Names containing accented characters used to always break SketchUp's Ruby file/folder processes.Newer SketchUp versions are more robust, but occasionally users with accented characters in their Windows user-name, when using certain unusual alphabets - e.g. Greek or Cyrillic - report issues...

To test this find your Users...Plugins folder [there's a tool in the SketchUcation submenu to open it for you].Copy the full path as a text string.Open the Ruby Console in SketchUp.Paste the text string into the following code snippet.File.exist?("TEXT_STRING_GOES_HERE")Note that you must use the ""If it returns false there's an issue...

did test, was not sure of "", so did twice, one with and one without.recived this:File.exist?("C:\Users\HyperWorks\AppData\Roaming\SketchUp\SketchUp 2018\SketchUp\Plugins")Error: #<SyntaxError: <main>: syntax error, unexpected tCONSTANT, expecting end-of-inputFile.exist?("C:\Users\HyperWorks\... ^>SketchUp:1:in `eval'

bimbachi wrote:did test, was not sure of "", so did twice, one with and one without.recived this:File.exist?("C:\Users\HyperWorks\AppData\Roaming\SketchUp\SketchUp 2018\SketchUp\Plugins")Error: #<SyntaxError: <main>: syntax error, unexpected tCONSTANT, expecting end-of-inputFile.exist?("C:\Users\HyperWorks\... ^>SketchUp:1:in `eval'

Irrespective of your chosen browser, SketchUp [until the most recent versions that can use HTMLdialogs] will use WebDialogs - these use Internet Explorer [PC] and Safari [MAC].Currently we use WebDialogs - expect that in the future newer SketchUp versions will use HTMLdialogs...

Irrespective of your chosen browser, SketchUp [until the most recent versions that can use HTMLdialogs] will use WebDialogs - these use Internet Explorer [PC] and Safari [MAC].Currently we use WebDialogs - expect that in the future newer SketchUp versions will use HTMLdialogs...

I described all actions in my post above that I was thinking is respons to your post with advices.Now I edited it by adding @tig.I hope it will reach to you.

This continuing issue suggests that your permissions are a mess.If you have successfully 'Repaired' the SketchUp installation using 'Run as administrator...' then older folders/files might have been made earlier, and therefore have unexpected limited permissions...Changing permissions to the TEMP folder might not be enough.

Try changing to unrestricted permissions for the following folders, and of course any files and subfolders/files etc within them...Of course, you might not have all of these folders in your setup !

This continuing issue suggests that your permissions are a mess.If you have successfully 'Repaired' the SketchUp installation using 'Run as administrator...' then older folders/files might have been made earlier, and therefore have unexpected limited permissions...Changing permissions to the TEMP folder might not be enough.

Try changing to unrestricted permissions for the following folders, and of course any files and subfolders/files etc within them...Of course, you might not have all of these folders in your setup !

all was done as we discussed.however I did uninstall and new installation again, and guess what now is even worse because user/password is not kept even by one session. I mean once logged, I'm in Store , I try install plug no luck and close window. when click on sketchucation icon I'm asked to provide user/password again?!!

TIG wrote:Have you done exactly as described in the earlier 'Repair' explanation.

Note that to install applications you must be logged into Windows as your normal user-name - NOT a separate admin-account.But if your user-name also has admin-powers, then that is OK.

Do NOT 'run' the SketchUp installer exe file by double-clicking on it, or choosing 'Run' from the context-menu.You MUST use the 'Run as administrator' option...Then choose 'Repair' when prompted.

You could consider 'Uninstalling' instead.Then running it again and choosing 'Install'...This might help because some more wrongly configured folders/files might be removed temporarily.

The SCF subfolders [and their contents] in the API path [those at least, but perhaps some more], need to have their permissions reset to allow you as the user and SketchUp to write to them...

Capture.PNG

If you fail when trying to do that, then consider deleting the whole SCF subfolder and starting again 'from scratch'...Once those folders/files are remade - hopefully now with the required permission - after adding your login details once, it should then work thereafter without any more prompts...

@tigspeaking of permission,let me ask to be sure, to whom I should grant non limited permissions?I was doing for "all" non restricted permissions

TIG wrote:The SCF subfolders [and their contents] in the API path [those at least, but perhaps some more], need to have their permissions reset to allow you as the user and SketchUp to write to them...

Capture.PNG

If you fail when trying to do that, then consider deleting the whole SCF subfolder and starting again 'from scratch'...Once those folders/files are remade - hopefully now with the required permission - after adding your login details once, it should then work thereafter without any more prompts...

I did clean install (removed everything concerning SKP (in local, roaming,etc) all permissions are on, added SCU plug-in and problem the same!?The most strange is that SCF folder was not created after login to Store?

A 'loaded' Plugin which also runs as an Extension can be 'disabled' at the Extension level, but if it's 'enabled' it can still get 'loaded' as SketchUp starts - then it shows with a gray background.

Conversely if you 'unload' a Plugin which is also an Extension, then it will not get 'loaded' as SketchUp restarts later, in that case it is similarly show with gray in the Extensions list to remind you that it will no longer be 'loaded'...

TT's Lib is unusual, in that although it is shipped as an Extension it doesn't do anything on its own, so whether or not it is 'enabled' is unimportant. Its many abilities can be accessed by TT's other Extensions as they need need them, getting the details from the files in the Lib's subfolder...

In passing... the color coding of Plugin text in the lists, is also relevant to their current loaded/unloaded status.Normally their names are black in the two columns, but if unloaded since loading earlier they become red in the right-hand column [to remind you that at a restart they will be unloaded], if loaded from the right column in that session then they are shown green in the left column, if temporarily-loaded from the right-column in that session, then they are shown orange in the right column.this is to remind you of their current states.Although you can 'load' a Plugin or 'enable' an Extension during a session, it is not possible to 'unload' a Plugin or 'disable' an Extension 'dynamically' in a session: it requires a restart of SketchUp to reset their changed statuses...

Thanks TIG for the explanation. Now i see that it is disabled under Extensions. Seems to be default as it is and it can't be enabled. I never noticed this before and thought i could have messed up something, because i disabled some plugins some time ago and now after some updates i saw this grey background.Thanks!